Translate src/ch03-04-comments.md

src/ch03-04-comments.md

@@ -1,46 +1,40 @@
-## Comments
+## 注释
 
-All programmers strive to make their code easy to understand, but sometimes
-extra explanation is warranted. In these cases, programmers leave notes, or
-*comments*, in their source code that the compiler will ignore but people
-reading the source code may find useful.
+很多程序员都在努力使他们的代码容易理解，但有时需要额外的解释。在这种情况下，程序员在它们的源代码中留下笔记或注释，编译器将会忽略掉这些内容，但读源代码的人可能会发现有用。
 
-Here’s a simple comment:
+这是一条简单的注释：
 
 ```rust
 // Hello, world.
 ```
 
-In Rust, comments must start with two slashes and continue until the end of the
-line. For comments that extend beyond a single line, you’ll need to include
-`//` on each line, like this:
+在 Rust 中，注释必须以两个斜杆开头，直到该行尾结束。对于超出单行的注释，需要在注释的每行行首加上 `//`，如下所示：
 
 ```rust
-// So we’re doing something complicated here, long enough that we need
-// multiple lines of comments to do it! Whew! Hopefully, this comment will
-// explain what’s going on.
+// 我们在这里处理一些复杂事情，需要足够长的解释，使用
+// 多行注释可做到这点。哇！我们希望这个注释将解释接下
+// 来要实现的内容。
 ```
 
-Comments can also be placed at the end of lines containing code:
+注释也可以放在包含代码的行后面：
 
-<span class="filename">Filename: src/main.rs</span>
+<span class="filename">文件名：src/main.rs</span>
 
 ```rust
 fn main() {
-    let lucky_number = 7; // I’m feeling lucky today.
+    let lucky_number = 7; // 我今天感觉好幸运。
 }
 ```
 
-But you’ll more often see them used in this format, with the comment on a
-separate line above the code it's annotating:
+不过下面的这种格式会更常见，将注释放到需要解释的代码的上面单独一行：
 
-<span class="filename">Filename: src/main.rs</span>
+<span class="filename">文件名：src/main.rs</span>
 
 ```rust
 fn main() {
-    // I’m feeling lucky today.
+    // 我今天感觉好幸运。
     let lucky_number = 7;
 }
 ```
 
-That’s all there is to comments. They’re not particularly complicated.
+这就是注释的全部内容，这些内容并不复杂。